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A bright living room with a wall-mounted split-system air conditioner

Upper North Shore, NSW

Ducted Air Conditioning Upper North Shore

Zoned ducted reverse-cycle for Upper North Shore homes, sized for large Federation floor plans and for winter heating as much as summer cooling. We measure the roof, the rooms and the block before we quote.

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Ceiling outlets in a renovated living area

Local knowledge

Zoning Federation estates and post-war brick homes from Roseville to Mount Colah

The grand homes through Wahroonga, Warrawee, Killara and Pymble are rarely a four-zone job. Floor areas are large, ceilings sit well above the modern standard, and a wing of bedrooms can be a long way from the kitchen, so we size capacity on room volume and often run six zones or more. Heritage conservation streets in Roseville and Killara add another step. Before the layout is final we work out where the outdoor unit can sit without showing on the streetscape, then plan duct runs around period cornices and any later additions that changed the roofline.

Winter sets the size up here more often than summer does. Deep canopy keeps many blocks in shade until late morning, and ground-floor rooms can stay cold long after the upper storey has warmed, so we check heating output at the design stage instead of picking a unit off a cooling chart. On two-storey rebuilds in Turramurra and St Ives, each level gets its own zones because the upstairs rooms run warmer in summer. St Ives also sits a little higher than its neighbours and runs cooler, which feeds into the capacity we recommend there.

North of Wahroonga the housing changes. Thornleigh and Normanhurst are mostly post-war brick homes with consistent, roomy ceiling cavities, which makes a ducted retrofit fairly predictable unless a rear extension has altered the roof. Westleigh's 1970s and 1980s homes back onto bushland on three sides, and Mount Colah's split-level houses step down sloping blocks toward Berowra Valley National Park. On those sites the condenser goes where it gets clean airflow and can be reached for coil cleaning, not simply on the nearest flat patch of ground.

Pricing

What ducted air conditioning costs in Upper North Shore

A post-war brick three-bedroom in Thornleigh or Normanhurst usually falls in the $11,000–$13,000 band for a single-storey ducted install. Four-bedroom family homes across St Ives, Turramurra and Lindfield typically land at $13,000–$16,000. The five-bedroom Federation estates and double-storey homes of Wahroonga, Killara and Pymble start from $16,000, because more zones and more heating capacity are involved. Running the whole house costs roughly $1–$2 per hour, and the $99 in-home assessment is taken off your final invoice.

  • 3-bedroom house

    $11,000 – $13,000

    Single storey; the typical entry point for a whole-home system

    • Daikin or Mitsubishi Electric inverter unit
    • 4 zones, 6–8 ceiling outlets
    • Standard ceiling-cavity install
    • Zone controller + electrical circuit
  • 4-bedroom house

    $13,000 – $16,000

    The most common Upper North Shore ducted job

    • Larger-capacity inverter system
    • 4–6 zones, 8–10 outlets
    • Single or double storey
    • Touch-panel controller, full commissioning
  • 5-bedroom or double storey

    $16,000+

    Bigger homes, more zones, tighter cavities

    • High-capacity or two-system design
    • 6–8 zones, 12+ outlets
    • Slim-line bulkheads where cavity is tight
    • Upstairs / downstairs zoned independently

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What moves the number up or down

  • System capacity (kW) sized to room area, insulation and exposure
  • Number of zones (more zones = more dampers + more controller channels)
  • Number and type of vents (linear-bar bulkheads cost more than square)
  • Single-storey vs double-storey (more duct runs, longer install)
  • Ceiling cavity height (slim-line vs standard chassis)
  • Outdoor unit location and access (slab, wall bracket, roof)
  • Electrical capacity (existing board upgrade if required)
  • Removal and disposal of any existing system
  • After-hours or weekend install premium

Scope of work

What's included, and what's not

What this service includes

  • On-site measure, room-by-room sizing, written zoned-layout proposal
  • Daikin or Mitsubishi Electric inverter ducted indoor + outdoor unit
  • Insulated flexible ductwork, slim-line bulkheads where cavity is tight
  • Low-profile ceiling vents (linear-bar or square as specified)
  • Touch-panel zone controller + wall-mounted thermostat
  • Dedicated electrical circuit and isolator (licensed in-house electrician)
  • Pressure-test, refrigerant charge, commissioning, controller walkthrough
  • Manufacturer warranty registration + ARCtick refrigerant compliance docs

Not included (quoted separately if needed)

  • Plasterboard / cornice patching beyond standard touch-up
  • Re-painting after vent or controller installation
  • Roof penetrations on tile roofs (separate trade required where structural)
  • Solar / battery integration (quoted separately)
  • Removal and disposal of system older than 15 years (asbestos check required)
  • Annual servicing (sold separately as a maintenance plan)

Process

How a ducted job runs in Upper North Shore

  1. 01

    On-site measure & quote

    We walk the home, measure rooms, check ceiling cavity height, and propose a zoned layout sized to your insulation and exposure.

  2. 02

    System selection

    Daikin or Mitsubishi Electric inverter ducted units, sized so the system runs efficiently rather than flat-out at peak.

  3. 03

    Installation

    Typically 1–3 days. Indoor fan coil in the ceiling, outdoor condenser on a slab or wall bracket, ducting and vents fitted, touch-up and clean as we go.

  4. 04

    Commissioning & handover

    Pressure-tested, charged, zoning verified room-by-room, controller walkthrough, manufacturer warranty registered.

Frequently asked

Common questions about ducted air conditioning in Upper North Shore

How many zones does a Wahroonga or Killara Federation home need?

Most of the large period homes we measure in Wahroonga, Warrawee and Killara end up with six or more zones rather than the usual four. The count follows how the house is lived in: separate bedroom wings, formal rooms that sit empty most days, and upper and lower levels that warm at different rates. We lay out the zones after walking through the home, not from a bedroom count on a listing.

Can ducted go into a Lindfield or Roseville bungalow with a low roof?

Often, but we check first. The older Federation cottages and California bungalows on these streets tend to have tighter, lower cavities than a double-storey rebuild nearby. If there is not enough depth for a standard indoor unit, we look at a slimmer unit, a different duct route, or a multi-head split for part of the house. The site measure decides, and you hear the answer before you commit to anything.

Will heritage rules affect where the outdoor unit goes?

On the conservation streets of Roseville and Killara, and around the period facades of Warrawee, they can. We aim for a position out of view from the street, with room for airflow and for a technician to reach the coil. Where an approval question applies to your address, we flag it at the quote stage so you can check it with council before any work is booked.

Is reverse-cycle ducted worth it for heating on the Upper North Shore?

For most homes here, heating is the main reason people choose ducted. Shaded blocks under heavy canopy hold the overnight chill, and bedrooms at the back of a big house feel it first. We size the Daikin or Mitsubishi Electric inverter system for its heating output as well as its cooling, so living areas and bedrooms warm properly on winter mornings rather than taking half the day.

Do bush-backed blocks in Westleigh or Mount Colah change the install?

They mostly change where the condenser goes. Blocks backing onto Berowra Valley bushland drop leaf and bark around outdoor units and often have shaded, damp corners. We keep the unit clear of the heaviest fall, on a level base with space to reach the coil, and on sloping Mount Colah blocks we plan the pipe run and drainage around the fall of the land.

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